Search a number
-
+
563491 = 1633457
BaseRepresentation
bin10001001100100100011
31001121222001
42021210203
5121012431
620024431
74534555
oct2114443
91047861
10563491
113553a5
12232117
13169636
141094d5
15b1e61
hex89923

563491 has 4 divisors (see below), whose sum is σ = 567112. Its totient is φ = 559872.

The previous prime is 563489. The next prime is 563501. The reversal of 563491 is 194365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194365 = 538873.

It is a 8-Lehmer number, since φ(563491) divides (563491-1)8.

It is a cyclic number.

It is not a de Polignac number, because 563491 - 21 = 563489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (563401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566 + ... + 1891.

It is an arithmetic number, because the mean of its divisors is an integer number (141778).

2563491 is an apocalyptic number.

563491 is a deficient number, since it is larger than the sum of its proper divisors (3621).

563491 is a wasteful number, since it uses less digits than its factorization.

563491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3620.

The product of its digits is 3240, while the sum is 28.

The square root of 563491 is about 750.6603759357. The cubic root of 563491 is about 82.5966299653.

The spelling of 563491 in words is "five hundred sixty-three thousand, four hundred ninety-one".

Divisors: 1 163 3457 563491